TY - JOUR
T1 - A 338-year tree-ring oxygen isotope record from Thai teak captures the variations in the Asian summer monsoon system
AU - Pumijumnong, Nathsuda
AU - Bräuning, Achim
AU - Sano, Masaki
AU - Nakatsuka, Takeshi
AU - Muangsong, Chotika
AU - Buajan, Supaporn
N1 - Funding Information:
This study was supported by the German Academic Exchange Service (DAAD), the Thailand Science Research and Innovation (TSRI) grant nr. RDG5930014 and TSRI grant nr. RSA6280017, the National Natural Science Foundation of China (NSFC) grant nr. 41661144021 and 41272197, the National Key Research and Development Program of China grant nr. 2017YFA0603401, Innovation Research Team Fund of Fujian Normal University grant nr. IRTL1705, Mahidol University, Amnatcharoen campus grant 2016-2020, and Postdoctoral fellowship award from Mahidol University for 2018-2020. We are deeply thankful to Dr. Thomas Neal Stewart for editing and proofing the English language of this manuscript. We also thank the anonymous referees for their valuable input and critical regarding for the manuscript.
Publisher Copyright:
© 2020, The Author(s).
PY - 2020/12/1
Y1 - 2020/12/1
N2 - A 338-year oxygen isotope record from teak tree-ring cellulose collected from Mae Hong Son province in northwestern Thailand was presented. The tree-ring series preserves the isotopic signal of the regional wet season rainfall and relative humidity. Tree-ring δ18O correlates strongly with regional rainfall from May to October, showing coherent variations over large areas in Southeast Asia. We reconstructed the summer monsoon season (May to October) rainfall based on a linear regression model that explained 35.2% of the actual rainfall variance. Additionally, we found that in the 19th century, there was a remarkable drought during many years that corresponded to regional historic drought events. The signals of the June to September Indian summer monsoon (ISM) for the period between 1948 and 2009 were clearly found. Spatial correlations and spectral analyses revealed a strong impact of the El Niño-Southern Oscillation (ENSO) on tree-ring δ18O. However, ENSO influenced the tree-ring δ18O more strongly in the 1870–1906, 1907–1943, and 1944–1980 periods than in the 1981–2015 period, which corresponded to periods of weaker and stronger ISM intensity.
AB - A 338-year oxygen isotope record from teak tree-ring cellulose collected from Mae Hong Son province in northwestern Thailand was presented. The tree-ring series preserves the isotopic signal of the regional wet season rainfall and relative humidity. Tree-ring δ18O correlates strongly with regional rainfall from May to October, showing coherent variations over large areas in Southeast Asia. We reconstructed the summer monsoon season (May to October) rainfall based on a linear regression model that explained 35.2% of the actual rainfall variance. Additionally, we found that in the 19th century, there was a remarkable drought during many years that corresponded to regional historic drought events. The signals of the June to September Indian summer monsoon (ISM) for the period between 1948 and 2009 were clearly found. Spatial correlations and spectral analyses revealed a strong impact of the El Niño-Southern Oscillation (ENSO) on tree-ring δ18O. However, ENSO influenced the tree-ring δ18O more strongly in the 1870–1906, 1907–1943, and 1944–1980 periods than in the 1981–2015 period, which corresponded to periods of weaker and stronger ISM intensity.
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U2 - 10.1038/s41598-020-66001-0
DO - 10.1038/s41598-020-66001-0
M3 - Article
C2 - 32488148
AN - SCOPUS:85085909762
SN - 2045-2322
VL - 10
JO - Scientific Reports
JF - Scientific Reports
IS - 1
M1 - 8966
ER -